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Testing Sensory and Multisensory Function in Children with Autism Spectrum Disorder
Published on: April 22, 2015
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Does the cognitive architecture of simplex and multiplex ASD families differ?
Anoek M Oerlemans1,2, Catharina A Hartman3, Barbara Franke4,5
1Department of Cognitive Neuroscience, Donders Institute for Brain, Cognition and Behaviour, Radboud university medical center, Nijmegen, The Netherlands. Anoek.Sluiter-Oerlemans@radboudumc.nl.
Journal of Autism and Developmental Disorders
|September 6, 2015
Summary
Autism spectrum disorder (ASD) cognitive profiles in simplex and multiplex families were similar. Cognitive deficits appear central to ASD, with affective prosody being a key familial risk marker.
Area of Science:
- Neuroscience
- Genetics
- Developmental Psychology
Background:
- Autism spectrum disorder (ASD) is a complex neurodevelopmental condition.
- Understanding the genetic and cognitive underpinnings of ASD is crucial.
- Family studies, including simplex (one affected individual) and multiplex (multiple affected individuals) families, offer insights into ASD etiology.
Purpose of the Study:
- To compare cognitive profiles of children with ASD in simplex versus multiplex families.
- To investigate whether cognitive impairments are core features of ASD or endophenotypic traits.
- To identify sensitive cognitive markers for detecting familial risk in ASD.
Main Methods:
- Assessed intelligence, social cognition, and executive functions in ASD probands and unaffected siblings.
- Compared cognitive performance across simplex (SPX) and multiplex (MPX) ASD families and controls.
- Analyzed within-family cognitive contrasts to understand heterogeneity.
Main Results:
- ASD probands in both SPX and MPX families showed similar cognitive profiles.
- Within-family cognitive differences were most pronounced in SPX families.
- Unaffected siblings were largely unimpaired, suggesting cognitive deficits are defining features of ASD, not endophenotypes.
- Affective prosody emerged as the most sensitive cognitive marker for familial ASD risk.
Conclusions:
- Stratifying ASD families by SPX/MPX status may help unravel etiological heterogeneity.
- Cognitive impairments are likely core features of the ASD phenotype.
- Affective prosody is a promising endophenotypic marker for identifying genetic risk for ASD.
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